Let's see... I absolutely love The Princess Bride. Hogfather, Storm Front, and The Hitchhiker's Guide to the Galaxy are all great too. I remember really enjoying The Book Thief, too, but I don't remember many details of the plot -- I read it all in one day back in high school, and it's all kind of a blur.

My family goes on a vacation every year to a city that has an amazing little used bookstore, and I've figured out that if I only bring cash with me when I go in, I won't completely overspend. I'll still walk out with a dozen books, though, because everything is super cheap and they have an awesome sci-fi/fantasy section.